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Simplest code for array intersection in javascript

... b.shift(); } } return result; } Non-destructive has to be a hair more complicated, since we’ve got to track indices: /* finds the intersection of * two arrays in a simple fashion. * * PARAMS * a - first array, must already be sorted * b - second array, must already be sort...
https://bbs.tsingfun.com/thread-3068-1-1.html 

我帮儿子用App Inventor 2给遥控车装了"蓝牙大脑",手机一划车就...

...p Inventor 2的蓝牙组件试试。没想到两小时就搞定了,而且连接稳定性和操控体验远超预期。 需求分析 儿子想要的是:手机屏幕上显示方向键,手指滑动时遥控车前进、后退、左右转。听起来简单,但拆解一下核心难点: ...
https://www.fun123.cn/reference/iot/ble.html 

App Inventor 2 低功耗蓝牙(BLE) 硬件接入、数据通信及IO控制 · App Inventor 2 中文网

...数据透传之外,一般硬件还支持内部的控制指令(如设置连接密码、查询硬件地址、主模式连接其他蓝牙等)。 注意:BRTS接GND才能执行控制指令,如图: AT开头是控制指令;非AT开头是透传数据: 这里仅演示了需求硬件状...
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Windows远程桌面授权错误(授权超时)等报错信息疑难解答 - 更多技术 - 清...

...权协议中发生网络问题,远程会话被中断。 客户端试图连接时,出现了授权错误。(授权超时。) 由于这台计算机没有终端服务器客户端访问许可证,远程会话被中断。该主题列出了可能出现在客户端计算机中的授权错误消...
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How to train an artificial neural network to play Diablo 2 using visual input?

... I can see that you are worried about how to train the ANN, but this project hides a complexity that you might not be aware of. Object/character recognition on computer games through image processing it's a highly challenging task (not say crazy for FPS and RPG games). I ...
https://www.tsingfun.com/it/tech/2003.html 

linux下iptables配置详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...CCEPT,所以我们就写需要DROP(放弃)的链. 减少不安全的端口连接 [root@tp ~]# iptables -A OUTPUT -p tcp --sport 31337 -j DROP [root@tp ~]# iptables -A OUTPUT -p tcp --dport 31337 -j DROP 有些些特洛伊木马会扫描端口31337到31340(即黑客语言中的 elite 端口)上...
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How to convert floats to human-readable fractions?

...ng for. Its based on the theory of continued fractions and very fast and fairly compact. I have used versions of this customized for specific numerator and denominator limits. /* ** find rational approximation to given real number ** David Eppstein / UC Irvine / 8 Aug 1993 ** ** With corrections ...
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Parsing command-line arguments in C?

...care of stuff like, for example: -?, --help for help message, including email address -V, --version for version information --usage for usage message Doing it yourself, which I don't recommend for programs that would be given to somebody else, as there is too much that could go wrong or lower qual...
https://www.tsingfun.com/ilife/tech/988.html 

抱腾讯大腿联姻知乎 搜狗不止要抄底百度 - 资讯 - 清泛网 - 专注C/C++及内核技术

...的PC时代,无论是搜索引擎或者其他一些信息工具,都是连接人与信息,而无线移动时代、共享经济时代,搜索更具“人性”。具体表现在以下三个方面:1,伴随着网页形态的变化,用户的需求也在改变,即用户需要更精准地去...
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Sql server默认的端口是多少?如何开启远程连接? - 爬虫/数据库 - 清泛IT...

默认是1433,可以在配置管理器中查看: 需要开放1433端口,可以参考《Windows、Linux开放指定端口》。 另外,开启远程连接还需要启用TCP/IP,然后重启服务,步骤如下: